Hemodynamic Side Effects Research Articles

Clinical Outcomes of Angiotensin II Therapy in Vasoplegic Shock: A Systematic Review and Meta-Analysis.

Angiotensin II is a peptide hormone vasopressor that activates angiotensin type 1 (AT1) receptors leading to vasoconstriction, the augmentation of arterial blood pressure (ABP), and organ perfusion. Angiotensin II was found to increase the ABP in catecholamine-refractory vasodilatory shock. Whether this effect improves the chances of survival or not remains inconclusive. Therefore, we conducted a systematic review and meta-analysis to evaluate the efficacy and safety of angiotensin II in vasoplegic shock. To evaluate the clinical significance of angiotensin II effects in vasoplegic shock concerning the hemodynamic impact, mortality outcomes, and side effects. Following PRISMA guidelines, we searched PubMed and EMBASE for experimental and observational studies published in English exploring the clinical outcomes of angiotensin II use in vasodilatory shock till 1 July 2024. Two independent authors assessed the quality and risk of bias of the included studies. A random effect model (Mantel-Haenszel) was used to combine data. The primary outcome was in-hospital mortality associated with angiotensin II use in comparison to standard therapy, while the secondary outcomes were mean arterial pressure (MAP) change, multi-organ failure (MOF), and the incidence of atrial fibrillation (AF). The Q test and I2 were used to examine heterogeneity, with I2 > 50% indicating marked heterogeneity. A total of eight studies (n = 974) comparing angiotensin II to standard therapy in vasoplegic shock were included in the systematic review, with three studies comprising 461 patients included in the final analysis of the primary outcome. Only one study evaluated the use of angiotensin II as a primary vasopressor, while the rest reported angiotensin II use in catecholamine-refractory vasodilatory shock. Overall, angiotensin II use was associated with similar in-hospital mortality compared to standard therapy (risk ratio [RR] = 0.83; 95% CI, 0.68-1.02, I2 = 0%). Likewise, there was no difference in MOF and AF (MOF: RR = 1.01; 95% CI, 0.61-1.65, I2 = 0%; AF: RR = 1.27; 95% CI, 0.38-4.23, I2 = 5%). However, angiotensin II use demonstrated a significant MAP increase (mean difference = -9.60; 95% CI, -9.71, -9.49, I2 = 0%). In vasodilatory shock, angiotensin II use demonstrated comparable in-hospital mortality compared to standard therapy. Nevertheless, it resulted in significant MAP change, which may encourage clinicians to use it in cases of profound hypotension.

Pharmacologic Sleep Aids in the Intensive Care Unit: A Systematic Review.

Background: Patients in the intensive care unit (ICU) often experience poor sleep quality. Pharmacologic sleep aids are frequently used as primary or adjunctive therapy to improve sleep, although their benefits in the ICU remain uncertain. This review aims to provide a comprehensive assessment of the objective and subjective effects of medications used for sleep in the ICU, as well as their adverse effects. Methods: PubMed, Web of Science, Scopus, Embase, and Cochrane Central Register of Controlled Trials were systematically searched from their inception until June 2023 for comparative studies assessing the effects of pharmacologic sleep aids on objective and subjective metrics of sleep. Results: Thirty-four studies with 3498 participants were included. Medications evaluated were melatonin, ramelteon, suvorexant, propofol, and dexmedetomidine. The majority of studies were randomized controlled trials. Melatonin and dexmedetomidine were the best studied agents. Objective sleep metrics included polysomnography (PSG), electroencephalography (EEG), bispectral index, and actigraphy. Subjective outcome measures included patient questionnaires and nursing observations. Evidence for melatonin as a sleep aid in the ICU was mixed but largely not supportive for improving sleep. Evidence for ramelteon, suvorexant, and propofol was too limited to offer definitive recommendations. Both objective and subjective data supported dexmedetomidine as an effective sleep aid in the ICU, with PSG/EEG in 303 ICU patients demonstrating increased sleep duration and efficiency, decreased arousal index, decreased percentage of stage N1 sleep, and increased absolute and percentage of stage N2 sleep. Mild bradycardia and hypotension were reported as side effects of dexmedetomidine, whereas the other medications were reported to be safe. Several ongoing studies have not yet been published, mostly on melatonin and dexmedetomidine. Conclusions: While definitive conclusions cannot be made for most medications, dexmedetomidine improved sleep quantity and quality in the ICU. These benefits need to be balanced with possible hemodynamic side effects.

Investigating the Role of Dexmedetomidine and Propofol on Fertility Rate in IVF Candidate Patients

Background: One of the most important treatments used in women with infertility is IVF, and improving its results can affect the success of assisted reproductive techniques. It was previously shown that anesthetics can enter the follicular fluid (FF), so there is concern about the accumulation of anesthetics in the FF and their negative effects on fertilization and fetal growth under general anesthesia. The use of drugs that have both analgesic and sedative effects but do not have hemodynamic side effects is of particular importance and dexmedetomidine is one of the drugs introduced in this field. On the other hand, the use of sedatives such as midazolam and propofol may cause hemodynamic disturbances and severe hypotension in these patients, which limits the use of such drugs. Accordingly, and considering the importance of the issue, in this study, we decided to evaluate and compare the effect of propofol and dexmedetomidine on fertility in IVF candidates. Methods: In this clinical trial study, 78 infertile patients who underwent IVF were randomly examined. After dividing the patients into two groups receiving dexmedetomidine and propofol or standard recording doses, the fertility rate of the patients in the two groups was evaluated using chi-square and Fisher tests at a significance level of 0.05. Results: The use of dexmedetomidine for (P = 0.0348) Pressure_After_Dia, HR_Before (P = 0.0204), Injection_Time (P =0.000) and Recovery Time (P =0.000) indices caused a significant increase compared to the propofol group. Conclusion: The results of the present study did not show a significant difference in the use of these two drugs on fertility.

Comparison of the effects of remimazolam tosylate and propofol on immune function and hemodynamics in patients undergoing laparoscopic partial hepatectomy: a randomized controlled trial

BackgroundLaparoscopic partial hepatectomy inevitably decrease patient immune function. Propofol has been shown to have immunomodulatory effects but is associated with hemodynamic side effects. Despite studies showing a negligible impact of remimazolam tosylate on hemodynamics, it has not been reported for partial hepatectomy patients. Its influence on immune function also remains unexplored. This study sought to investigate the differences in immune function and intraoperative hemodynamics between patients who underwent laparoscopic partial hepatectomy with remimazolam tosylate and those who underwent laparoscopic partial hepatectomy with propofol.MethodsThis was a single-center, randomized controlled trial involving 70 patients, who underwent elective laparoscopic partial hepatectomy. The patients were randomly divided into two groups: the remimazolam group (group R) and the propofol group (group P). In this study, the primary outcomes assessed included the patient’s immune function and hemodynamic parameters, and the secondary outcomes encompassed the patient’s liver function and adverse events.ResultsData from 64 patients (group R, n = 31; group P, n = 33) were analyzed. The differences in the percentages of CD3+, CD4+, CD8+, and NK cells and the CD4+/CD8+ ratio between the two groups were not statistically significant at 1 day or 3 days after surgery. Compared with those in group P, the MAP and HR at T2 and the MAP at T1 in group R were significantly increased(P < 0.05). The differences in HR and MAP at T0, T3, T4, T5, T6, and T7 and HR at T1 between the two groups were not statistically significant. There were no differences in liver function or adverse effects between the two groups, suggesting that remimazolam tosylate is a safe sedative drug(P > 0.05).ConclusionThe effects of remimazolam tosylate on the immune function of patients after partial hepatectomy are comparable to those of propofol. Additionally, its minimal effect on hemodynamics significantly decreases the incidence of hypotension during anesthesia induction, thereby enhancing overall perioperative safety.Trial registrationThe trial was registered on May 9, 2022 in the Chinese Clinical Trial Registry, registration number ChiCTR2200059715 (09/05/2022).

A Prospective Randomized Clinical Study to Assess and Compare the Efficacy of Ultrasound Guided Quadratus Lumborum Block versus Transversus Abdominis Plane Block for Postoperative Analgesia in Patients Undergoing Abdominal Hysterectomy Under General Anaesthesia

Abstract Background and Aims: Multimodal analgesia regimens for optimizing the postoperative pain following abdominal surgeries are a crucial component of enhanced recovery after surgery (ERAS), as it reduces postoperative opioid consumption along with their adverse effects. We compared the analgesic efficacy of ultrasound-guided transmuscular quadratus lumborum block (QLB) versus posterior transversus abdominis plane block (TAPB) with respect to duration of analgesia, modified Defense and Veterans Pain Rating Scale (DVPRS) scores for pain, activity, sleep, stress, and mood, respectively, the total amount of rescue analgesic consumption, hemodynamics parameters and side effects, in patients undergoing total abdominal hysterectomy under general anesthesia. Materials and Methods: In this study, which was prospective, randomized, and double-blind, 60 patients of the American Society of Anesthesiologists Physical Status I and II, aged 18–65 years, undergoing abdominal hysterectomy, were randomized into two groups. Group QLB (n = 30) and Group TAPB (n = 30) received bilateral QLB and TAPB with 40 ml of 0.375% ropivacaine, respectively. The data were compared using standard qualitative and quantitative tests. Results: The duration of pain relief was longer in Group QLB compared to Group TAPB (981.83 ± 138.62 min vs. 637 ± 127.02 min, P &lt; 0.0001). The DVPRS score for pain, activity, sleep, stress, and mood, respectively, were significantly lower in Group QLB (P &lt; 0.05). The total rescue analgesic consumption was significantly lesser in Group QLB (103.33 ± 18.26 mg) compared to Group TAPB (150.00 ± 50.85 mg) (P &lt; 0.0001). No significant hemodynamic changes or side effects were observed (P &gt; 0.05). Conclusion: Bilateral QLB significantly prolonged the duration of analgesia with reduced rescue analgesic requirement compared with bilateral TAPB in patients undergoing total abdominal hysterectomy.

Intraoperative Patient Warming Instead of Gas on the Management of Postoperative Pain in Laparoscopic Colectomy and Cholecystectomy: A Randomized Controlled Trial.

Blurred lines remain in details of the association between patient warming with postoperative pain and a proper analgesic requirement. Therefore, the present study proposes to observe the effects of intraoperative patient warming and carbon dioxide insufflation duration in laparoscopic colectomy (LCol) andlaparoscopic cholecystectomy (LChol) procedures on postoperative pain, analgesic requirements, and hemodynamics. The present study involved 80 cases aged 18-80 years with the American Society of Anesthesiologists I-III classification, possessing two initial groups primarily, one for LCol and one for LChol. Subsequently, each was divided into two through randomization for intraoperative warming. Postoperatively, pain perception, per se, was evaluated using the visual analog scale (VAS) score at the 30 minutes, 1st, 6th, 12th, and 24th hours, along with the impact of pain on hemodynamic parameters and side effects such as nausea/vomiting and the dosage of analgesics used. Groups actively heated with warm air-blowing devices detected significantly higher intraoperative core and skin temperature measurements, and postoperative early pain perception was significantly lower in the warmed ones. Furthermore, a significant decrease in the VAS scores and the analgesic at the 12th and 24th hours compared to the first six hours was recognized between them. Consequently, herewith, we postulate that so-called patient warming positively affects the VAS scores.

Effects of dexmedetomidine on renal function after cardiac surgery for infective endocarditis: An interim analysis of a randomized controlled trial

BackgroundPatients undergoing cardiac surgery for infective endocarditis (IE) are at a high risk of postoperative acute kidney injury (AKI) owing to heightened systemic inflammation. Therefore, we aimed to investigate the effect of dexmedetomidine on postoperative AKI in patients who underwent cardiac surgery for IE. MethodsA total of 63 patients who underwent cardiac surgery for IE were randomly assigned to receive either intravenous dexmedetomidine infusion of 0.4 μg kg−1 h−1 (DEX group) or normal saline infusion (control group) for 24 h after induction of anesthesia. The occurrence of AKI within seven days postoperation, epinephrine, norepinephrine, and interleukin-6 levels, as well as postoperative morbidities, were assessed. An intertrim analysis was conducted using Pocock's alpha spending function at α = 0.05 and β = 0.2. ResultsThis trial was early terminated according to the results of interim analysis performed when 60 % of the pre-set number of patients have been collected. The incidence of AKI was significantly lower in the DEX group than in the control group (32.3 % vs. 9.4 %, p = 0.025). Patients in the DEX group had significantly lower epinephrine levels than those in the control group, whereas norepinephrine and interleukin-6 levels were similar. Perioperative mean arterial pressure or heart rate did not differ between the groups. ConclusionsDexmedetomidine administration for 24 h starting from induction of anesthesia significantly reduced the incidence of postoperative AKI after cardiac surgery for IE (by 29 % vs. control) without hemodynamic side effects. This was accompanied by a significant attenuation of postoperative increase in serum epinephrine levels.

Comparison of nalbuphine and morphine as intrathecal adjuvant to 0.5% bupivacaine for post-operative analgesia in lower abdominal surgeries – A randomized and control study

Background: The use of a higher volume of 0.5% bupivacaine, however, is associated with hemodynamic instability. Adjuvants such as morphine and other opioids are added in with the local anesthetic to reduce this adverse effect and extend the duration of sensory block, hence extending the length of analgesia. However, opiates are associated with a high risk of respiratory depression and other side effects. Nalbuphine has been used to counteract these adverse effects. Thus, we decided to compare the analgesic effect of intrathecal (IT) nalbuphine with IT morphine. Aims and Objectives: The aim of the study was to compare IT morphine with nalbuphine as adjuvant to a spinal anesthetic agent. The primary objective was to compare between the time of onset of sensory and motor blockade and the post-operative analgesic duration between the two adjuvants, while hemodynamic variables and side effects were studied as secondary variables. Materials and Methods: This randomized controlled study was conducted after Ethical Committee approval for a period of 1 year on 100 patients who fulfilled the inclusion criteria. They were randomized into two groups to receive sub-arachnoid block: Group A: 3 mL of 0.5% Hyperbaric Bupivacaine and 0.2 mg morphine and Group B:3 mL of 0.5% Hyperbaric Bupivacaine and 0.5 mg nalbuphine. The following parameters were monitored – Height, Weight, blood pressure, American Society of Anesthesiologists grading, time of onset, maximum duration and regression of Motor and sensory blocks, and total duration of analgesia. Results: The onset of sensory blockade was comparable in both groups while the onset of motor blockade was significantly longer in the morphine group (P≤0.001). The duration of analgesia in the morphine group was longer as compared to nalbuphine group and was statistically significant (P&lt;0.05). The incidence of side effects was 26% in the morphine group and 6% in the nalbuphine group, which was statistically significant (P&lt;0.05). Fourteen patients in the morphine group had pruritus and four patients in the nalbuphine group experienced nausea. Conclusion: IT nalbuphine with 0.5% bupivacaine produces rapid onset of anesthesia and early post-operative analgesia with minimal side effects, but the total analgesic duration was more with IT morphine.

In-line Mechanical Insufflation-Exsufflation as an Alternative to Invasive Suction for Secretion Management in Ventilated Patients, A Randomized Controlled Trial

Background Catheter suction (CS), the standard method for airway secretion management in tracheostomized or intubated patients, is invasive and has significant hemodynamic and traumatic side effects. In-line mechanical insufflation-exsufflation (IL-MIE) is a new, non-invasive technology that clears secretions by simulating coughs without interrupting ongoing mechanical ventilation. It is not known whether IL-MIE can be safely and effectively used as an alternative to CS in these ventilated patients. Methods A randomized controlled study was conducted comparing a standard protocol of CS with automatic IL-MIE (CoughSync, Ruxin Medical Systems, Beijing) performed every 30 minutes, with CS added only if needed, in post-operative mechanically ventilated patients. Results Over 8 hours, the IL-MIE cohort required significantly fewer CS treatments per patient than the control cohort (mean 0.4 vs. 2.6, p &lt; 0.001, n = 60 for both cohorts). Seventy-three percent of the IL-MIE subjects required no CS at all, compared to 2% in the control group (p &lt; 0.001). At 8 hours, IL-MIE subjects had a significantly lower heart rate than control subjects (mean 90 vs. 96, p = 0.047), implying a hemodynamic advantage to IL-MIE. No significant adverse events were associated with IL-MIE. Conclusions IL-MIE minimizes the need for invasive CS without detriment to ventilatory management in mechanically ventilated patients.

Long-term hemodynamic response of carvedilol and simvastatin in compensated versus decompensated chronic liver disease with portal hypertension

Background: A combination of carvedilol and Simvastatin have recognized their role as rescue therapy for carvedilol non-responders in chronic liver disease (CLD)-associated portal hypertension. However, there are scarce data regarding its role in specific subclasses, and stratification of response according to the computed tomographic perfusion (CTP) score has never been seen before. Aims and Objective: (1) To compare hemodynamic response and side effects of a combination therapy in decompensated and compensated patients. (2) Stratify the effect of combination therapy according to CTP score. Materials and Methods: In 102 consecutive patients of CLD with esophageal varices, the hepatic venous pressure gradient was measured at baseline and after 3 months of dose optimization of carvedilol. Simvastatin was added to non-responders and hemodynamics repeated at 1 month of dual therapy. The response of compensated CLD was compared with decompensated patients and was stratified as per the CTP on follow-up. Results: Overall, out of 43 compensated patients, 21 responded acutely and response increased to 29 (67.44%) at 3 months. While 31 of 59 (52.54%) decompensated patients responded acutely but dose escalation did not increase response significantly after 3 months. The addition of Simvastatin did increase the response, although side effects were more in decompensated group. The addition of Simvastatin also decreased decompensation in the high-risk compensated group and maintained their MELD.Na. Conclusion: Response in compensated CLD patients was more than in decompensated patients; however, it was statistically insignificant. Attrition was more in patients with CTP &gt;10 due to drug intolerance, side effects, or deaths.

A Comparative Clinical Study to Evaluate the Antinociceptive Efficacy of Intravenous versus Intraperitoneal Dexmedetomidine with Ropivacaine in Patients Undergoing Laparoscopic Cholecystectomy

Background and Aims: Intraperitoneal (IP) local anesthetic administration has become a routine in laparoscopic surgeries. An additive to local anesthetic like alpha-2 agonist such as dexmedetomidine may enhance the efficacy of local anesthetic. Our primary objective was to compare the duration of analgesia and our secondary objectives were to compare the total amount of rescue analgesics in 24 h, hemodynamic changes, and adverse effects after the use of dexmedetomidine intraperitoneally versus intravenously in addition to 0.25% ropivacaine instillation intraperitoneally. Materials and Methods: Eighty patients aged 18–60 years of American Society of Anesthesiologists physical status I and II, undergoing laparoscopic cholecystectomy, were randomly allocated into two groups – Group V (n = 40) received 100 ml normal saline (NS) with 0.7 µg/kg dexmedetomidine over 15 min followed by 30 ml 0.25% ropivacaine intraperitoneally and Group P (n = 40) received 100 ml NS over 15 min followed by 30 ml 0.25% ropivacaine with 0.7 µg/kg dexmedetomidine intraperitoneally soon after removal of gallbladder at the end of surgery. Results: The duration of analgesia was significantly longer in Group V (246.45 ± 27.00 min) as compared to Group P (112.83 ± 11.61 min) (P &lt; 0.0001). The total amount of rescue analgesic consumption in 24 h was significantly reduced in Group V (185.00 ± 73.55 mg) as compared to Group P (225.00 ± 77.63 mg) (P &lt; 0.05). As compared to Group P, patients in Group V had a statistically significant Ramsay Sedation Score. The hemodynamic parameters and side effect profile were comparable in both the groups. Conclusion: IV dexmedetomidine 0.7μg/kg is more efficacious as compared to IP dexmedetomidine along with IP ropivacaine 0.25% in laparoscopic cholecystectomy in terms of prolonged duration of analgesia and decreased requirement of rescue analgesia in 24 h.

Comparison of Cardiac Indices Using Two Different Concentrations of Topical Adrenaline during Endoscopic Transsphenoidal Pituitary Surgery: A Prospective Randomized Observational Study.

Introduction Adrenaline-soaked wicks are often employed to decongest nasal mucosa during transsphenoidal pituitary surgeries to ensure proper hemostasis and visibility of the operating field. Considerable debate exists regarding the optimum concentration of adrenaline that strikes a balance between hemostasis as well as the hemodynamic side effects of adrenaline. This study assessed cardiac indices like cardiac output and cardiac index using a FloTrac Vigileo cardiac output monitor to compare two different concentrations of adrenaline used for topical instillation. Materials and Methods 60 adult patients undergoing transsphenoidal pituitary surgery were randomly assigned to receive cotton wicks soaked in adrenaline solution (either 1:100,000 or 1:200,000) for nasal decongestion. Following a standardized anesthetic regime, a FloTrac Vigileo cardiac output monitor was attached with the invasive arterial line for precise monitoring and recording of cardiac indices (cardiac output and cardiac index). Additionally, quality of surgical field (as reported by the operating surgeon) blood loss, incidences of adverse hemodynamic events, and rescue drug usage were recorded. Results No difference in cardiac outputs and cardiac indexes of the patients was observed during baseline to 55 minutes and at 80 minutes and onward, whereas difference rose to statistical significance at the time points of 60 minutes and 70 minutes ( p < 0.05). Other parameters like stroke volume, stroke volume variation, and hemodynamic parameters were similar. Quality of the surgical fields (as reported by the surgeon), intraoperative bleeding, incidences of adverse effects, and frequency of rescue drugs usage were similar. Conclusion Instillation of 1:100,000 dilution of adrenaline solution compared with 1:200,000 for nasal decongestion is associated with significant rise in cardiac output and cardiac index at 60 and 70 minutes of the surgery with similar blood loss and hemodynamic variables. Therefore, the lower concentration of adrenaline can be recommended for usage during transsphenoidal pituitary surgeries.

Comparative Study on the Effects of Lignocaine Nebulization with I/V Lignocaine on Stress Response to Laryngoscopy and Tracheal Intubation

Aim: To determine the frequency of any immediate side effects associated with the use of lignocaine in patients. Methodology: Randomized control trial. Sindh Institute of Urology and Transplantation, Karachi from 1st December 2021 to 31st May 2022. Ninety patients enrolled for laryngoscopy and endotracheal intubation. Patients were randomly allocated into three groups on the basis of the treatment. Thirty patients in group I was treated with 2% lignocaine 1.5mg/kg was given by intravenous route, 30 in group N was received 4% lignocaine 1.5mg/kg was given by nebulization and 30 in groups C treated as control group in whom normal saline placebo. The hemodynamic response and side effect was recorded in all patients. Results: The mean heart rate was not statistically significant among groups at baseline and 1 min, 3min to 8 min, while it was statistically significant at 2 min and 9 min among the groups. Mean atrial BP was statistically significant among groups during 2 min to 6 min and then 8 min. regarding immediate side effects, the frequency of side effects were lower in group N and group I than in group C. However, the rate of drowsiness, tremors, and hypoxia was significantly higher in group C compare to group N and group I. Conclusion: Lignocaine is a safe drug and proved to be safe and effective method for the improvement of hemodynamic response to intubation and laryngoscopy. Keywords: Lignocaine, Nebulization of 4%lignocaine, Hemodynamic response, Endotracheal intubation

Intrathecal dexmedetomidine as an adjuvant to plain ropivacaine for spinal anesthesia during cesarean section: a prospective, double-blinded, randomized trial for ED50 determination using an up-down sequential allocation method

BackgroundIntrathecal dexmedetomidine, as an adjuvant to local anesthetics, has been reported to improve the quality of spinal anesthesia and reduce the required local anesthetic dose. However, the optimal dosage regimen for intrathecal dexmedetomidine combined with plain ropivacaine for cesarean section (CS) remains undetermined. The present study aimed to determine the median effective dose (ED50) of intrathecal dexmedetomidine as an adjuvant to plain ropivacaine for spinal anesthesia during CS.MethodsSixty parturients undergoing CS were randomly assigned to either group: plain ropivacaine 8 mg (Group Rop8) or plain ropivacaine 10 mg (Group Rop10). The initial dosage of intrathecal dexmedetomidine in each group was 5 µg. The effective dose was defined as a bilateral sensory block at the level of T6 or above to pinprick attained within 10 min after intrathecal injection, without the need for supplementary intraoperative epidural anesthesia. Effective or ineffective responses were determined, followed by a 1 µg increment or decrement in the dose of intrathecal dexmedetomidine for the next parturient using up-down sequential allocation. ED50 were calculated using probit regression.ResultsThe ED50 of intrathecal dexmedetomidine with plain ropivacaine was 5.9 µg (95% confidence interval [CI], 4.9–7.4 µg) in Group Rop8 and 3.1 µg (95% CI, 0.1–4.8 µg) in Group Rop10 (P < 0.05). Hemodynamic stability, side effects, patient satisfaction and neonatal outcomes were comparable between the two groups.ConclusionsThe present data suggested that the ED50 of intrathecal dexmedetomidine as an adjuvant to 8 mg and 10 mg plain ropivacaine in spinal anesthesia during cesarean section was approximately 6 µg and 3 µg, respectively.Trial registrationChinese Clinical Trial Registry, identifier: ChiCTR2200055928.

COMPARISON OF HYPERBARIC LEVOBUPIVACAINE/ BUPIVACAINE FOR CESEREAN SECTION

Background : Bupivacaine is the most popular local anesthetic agent in obstetric practice Levobupivacaine showed a lower risk of cardiovascular and central nervous system (CNS) toxicity compared to Bupivacaine The aim of this study was to investigate the clinical efficacy of levobupivacaine compared with hyperbaric bupivacaine for spinal anesthesia for cesarean section. Methods: 60 pregnant women in ASA I - II group scheduled to have elective cesarean operation were allocated into the study. Patients were randomly divided into two groups. 10 mg levobupivacaine (0.5%) for Group L (n = 30) patients, 10 mg hyperbaric bupivacaine (0.5%) for B (n = 30) patients were intrathecally administrated a total of 2.0cc. Sensory and motor block characteristics of the groups were assessed with pinprick and Bromage scale observed hemodynamic changes and side effects were recorded. Results: The time to reach maximum dermatome for the sensory block, time to regression by two dermatomes and time to regress to T12 dermatome was found to be significantly long in Group B. It was observed that in Group B, the motor block was faster and lasted longer. Where as hypotension, bradycardia and nausea were less in Group L, the need for ephedrine was higher in Group B (p &lt; 0.05). Conclusion: Since motor block time is shorter, and side effects like hypotension, bradycardia and nausea are less, levobupivacaine can be a good alternative in cesarean sections.

Remimazolam versus propofol in combination with esketamine for surgical abortion: A double-blind randomized controlled trial.

Remimazolam is a new benzodiazepine with a short half-life, good efficacy, and safety profiles in general anesthesia. Combining esketamine with propofol (P + E) could reduce propofol consumption and injection pain. It is, however, unclear if a low dose of remimazolam co-administrated with esketamine (R + E) is comparable to the increasingly used P + E for surgical abortion with general anesthetic. We conducted a double-blind randomized controlled trial to compare the efficacy and safety of R + E and P + E. Two hundred patients scheduled for a surgical abortion were randomized to receive remimazolam 0.3 mg/kg plus esketamine 0.3 mg/kg (R + E), and propofol 2 mg/kg plus esketamine 0.3 mg/kg (P + E). Sedative effectiveness was evaluated by measuring the time to lose consciousness (LOC), recovery time, and successful sedation rate. Safety was assessed by hemodynamics and adverse events during and postoperation. The time to LOC and recovery time in R + E was 5 s shorter and 1 min longer than that in P + E, respectively (both p < 0.001). Success sedation rate did not differ between groups (p = 0.73). Bradycardia incidence and injection site pain were less frequent in the R + E group than that in the P + E group. More rash was observed in the R + E group compared with the P + E group (32% vs. 5%, p < 0.001), but all were mild (only chest rash) and resolved subsequently. Low dose of remimazolam when combined with esketamine has favorable profiles with rapid onset and recovery, but mild hemodynamic side effects and adverse events. It can be used as an alternative for surgical abortion with general anesthetic.

Atracurium Versus Cis-Atracurium for Laryngeal Relaxation and Hemodynamic Stability in Pediatric Patients: A Randomized, Double-Blind Study.

Background and aim Equipotent dose of atracurium and cis-atracurium has failed to show clinically equi-effective muscle relaxation actions required for laryngoscopy and endotracheal intubation (LETI) in adults. There needs to be more data on children. We aimed to compare the efficacy of equipotent atracurium and cis-atracurium for producing optimal LETI. We also compared the hemodynamic stability and side effects. Methods With approvals and informed consent, 104 children between three and 12 years were enrolled in the present randomized, double-blind, parallel-arm study. Fifty-two participants were recruited in each group and received either 2ED95 atracurium (0.5mg/kg) or 2ED95 cis-atracurium (0.1mg/kg). Three-point scale, i.e., excellent, good, and poor, were assigned based on jaw relaxation, vocal cords, diaphragmatic movement, coughing, and resistance to the laryngoscope blade. Basic hemodynamics and adverse events like flushing, hemodynamic instability, and airway spasms were noted. The groups were compared using Wilcoxon-Mann-Whitney U or Chi-square tests as applicable; a p-value <0.05 was considered significant. Results Entire enrolled participants completed the study. Excellent LETI conditions were significantly higher in the atracurium than in cis-atracurium (53.8% versus 19.2%, p-value <0.001). In the present study, blunted laryngoscopy-related sympathetic surge containing the increase in hemodynamic parameters within 20% from the baseline was noted in both groups, but the blunting and fall back of hemodynamic towards the baseline was rapid in the atracurium (within 7 minutes of LETI) group than cis-atracurium, i.e., 72 minutes; p-value <0.001. Only one flushing was noted in the atracurium group compared to none in the cis-atracurium. Conclusion 2ED95 dose of cis-atracurium (0.1mg/kg), although have minor advantages of maintaining hemodynamic better, has lower adverse events, it provides significantly lower 'Excellent LETI conditions' when compared to 2ED95 dose of atracurium (0.5mg/kg) in children of age three to 12 years.

Comparison of Bispectral index-guided propofol and etomidate infusion for Supraglottic airway insertion

IntroductionSupraglottic airway devices have become extremely popular for minor therapeutic and surgical procedures. Their insertion requires an adequate depth of anesthesia with suppression of pharyngeal reflexes. Propofol is the most commonly used agent, but has hemodynamic side-effects. Etomidate, although hemodynamically stable, does not suppress pharyngeal reflexes adequately. Moreover, the use of clinical signs to assess the depth of anesthesia has questionable accuracy. Using bispectral index (BIS) monitoring, the hypnotic component of the anesthetic can be measured, with values of 40–60 implying adequate depth of anesthesia. MethodsThis randomized controlled trial included 80 ASA I patients, divided into two groups of 40 patients. Each group received either propofol or etomidate infusion, with BIS monitoring. At BIS 50, infusions were stopped and SGA was inserted. Changes in hemodynamic parameters, time for SGA insertion, number of attempts, and SGA insertion scores were recorded. ResultsWhen BIS reached 50, a statistically significant fall in mean arterial pressure was observed in the propofol group. Time for SGA insertion was less in the propofol group (30.7 ± 8.0 s), with successful SGA insertion observed in 92.5% of patients on the first attempt, compared with 47.9 ± 9.1 s and 32.3% in the etomidate group. ConclusionIn comparison with etomidate, the use of propofol is associated with better conditions for SGA insertion but has the side-effect of hypotension, even with BIS-guided titration of dose for maintaining an adequate depth of anesthesia.

Comparing intraoperative hemodynamics and medication use during cranial nerve monitoring with partial muscle relaxants versus without in cerebellopontine angle tumors: a randomized controlled trial

BackgroundThere are many methods used for cranial nerve monitoring in cerebellopontine angle (CPA) tumor excision with or without muscle relaxant which may affect hemodynamics and consumption of drug doses. The partial neuromuscular blockade, on the other hand, appears to be compatible with monitoring in some patients, according to clinical experience. In this study, we evaluated hemodynamic changes and drug consumption differences between partial and without muscle relaxants.Forty patients ages ranging from 18 to 60 years old had CPA surgery and were given either a muscle relaxant to maintain neuromuscular blockade level train-of-four (TOF) count two (group A) or a placebo of normal saline to maintain train-of-four (TOF) count four (group B). Fentanyl was given to both groups. The dose of fentanyl was modified to 0.5–1 mcg\\kg/h, while the dose of propofol was modified to have bi-spectral index between 40 and 60. The total amount of propofol and fentanyl, as well as mean blood pressure and heart rate, are all measured intraoperatively.ResultsThere was a statistically significant difference in propofol and fentanyl doses between both research groups (p = 0.003, p = 0.002) respectively during the intraoperative period. Furthermore, there is a difference in as there were significant differences between two groups in time between stop of anesthesia and eye opening which is shorter in group with partial muscle relaxant reflecting shorter duration of anesthesia and recovery time (stop anesthesia to eye opening time) (p = 0.003, p > 0.001) respectively. Also, there was no statistically significant difference in the incidence of nausea and vomiting, shivering, bradycardia, or hypotension between the two study groups.ConclusionsWe demonstrated that partial muscle relaxant (train of four count 2) has benefits over no muscle relaxant (train of four count 4) for patients undergoing cerebellopontine angle tumor surgery because it can reduce anesthetic duration and generate rabid recovery. Furthermore, partial muscle relaxants exhibit the same hemodynamic stability, side effects, and surgical interruptions as group without muscle relaxants.

A COMPARISON OF MAGNESIUM SULPHATE AND DEXAMETHASONE AS AN ADJUVANT TO CAUDAL LEVOBUPIVACAINE FOR POSTOPERATIVE ANALGESIA IN PAEDIATRIC INFRA UMBILICAL SURGERIES.

BACKGROUND: Caudal Anaesthesia is commonly performed anaesthetic technique in paediatric patients undergoing various infra-umbilical surgeries. Prolongation of caudal analgesia using single shot technique can be achieved by addition of various adjuvants. To compare efcacy of post operative analgesia of Magne AIM: sium sulphate and Dexamethasone with Levobupivacaine in caudal anaesthesia. This was randomised double blinded cont METHOD: rolled study conducted on 60 paediatric patients of age group 1-6 year and ASA I-II grade, undergoing infraumbilical surgeries, divided randomly into 2 groups. Group M (n= 30) received 50mg Inj. Magnesium sulphate with Inj. Levobupivacaine 0.25% (1ml/kg) and Group D (n= 30) received 0.1mg/kg Inj. Dexamethasone with Inj. Levobupivacaine 0.25% (1ml/kg) in caudal block after induction with general anaesthesia. Duration of analgesia, intraoperative cardiovascular stability and adverse effects were assessed. Duration of post operative analgesia and time of rst rescue analgesia requirement was assessed using FLACC score (FLACC score&gt;\=4). Standard qualitative and quantitative tests were used to analyse and compare the results. P&lt;0.05 considered as statistically signicant. The mean duration of analgesia was s RESULTS: ignicantly longer in group D than group M with p&lt; 0.001. No signicant hemodynamic changes and side effects were observed in both groups. Dexa CONCLUSION: methasone 0.1mg/kg and Magnesium sulphate 50mg as an adjuvant to 0.25% Levobupivacaine in caudal Anaesthesia are safe and Dexamethasone as adjuvant to Caudal Levobupivacaine provides prolonged analgesia than Magnesium sulphate.